[jasonblais]

@pas: Mattermost is indeed integrated with GitLab Omnibus.

To enable Mattermost, you can add the Mattermost external URL in the config file, and run `sudo gitlab-ctl reconfigure`. I'm wondering if that's something you've tried? https://docs.gitlab.com/omnibus/gitlab-mattermost/#getting-s...

[pas]

Thanks for your reply! I gave it another try, and it works now beautifully :o (Possibly last time I tried it, there was no LetsEncrypt integration and the external URL setup was more involved?)